Transverse-rotor aircraft: Difference between revisions
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{{More citations needed|date=October 2024}} |
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[[File:Iwo Jima Osprey.jpg|thumb |
[[File:Iwo Jima Osprey.jpg|thumb|An [[Bell Boeing V-22 Osprey|MV-22B Osprey]] lands aboard the {{USS|Iwo Jima|LHD-7}}.]] |
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[[File:Fw 61 V.JPG|thumb |
[[File:Fw 61 V.JPG|thumb|[[Hanna Reitsch]] in [[Focke-Wulf Fw 61|Fw 61 V2]]]] |
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[[File:MI-12.JPG|thumb |
[[File:MI-12.JPG|thumb|An [[Mil V-12]] at Monino Central Air Force Museum (Moscow)]] |
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[[File:Transverse rotors Animation.gif|upright=0.5|thumb|Animation]] |
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A '''transverse-rotor aircraft''' is an [[aircraft]] with two large [[Horizontal plane|horizontal]] [[helicopter rotor|rotor]] assemblies mounted side by side. |
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Single-rotor helicopters (unicopters) need an additional [[tail rotor]] or [[NOTAR|tail exhaust]] to neutralize the [[reaction (physics)|reaction]]al [[angular momentum]] produced by the main rotor. Transverse rotor helicopters, however, use counter-rotating rotors, with each cancelling out the other's torque. Counter-rotating rotor blades also won't collide with and destroy each other if they flex into the other rotor's pathway. In addition, transverse rotor configuration has the advantage of higher [[payload]] with shorter [[airfoil|blade]]s, since there are two sets working to provide [[lift (force)|lift]]. Also, all of the power from the engines can be used for lift, whereas a single-rotor helicopter must divert part of its engine power to generate tail [[thrust]]. |
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Transverse rotor design with rotatable [[nacelle]]s are known as [[tiltrotor]]s while designs where the whole wing rotates are known as [[tiltwing]]s. |
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This configuration also has the advantage of being able to hold more weight with shorter blades, since there are two sets. Also, all of the power from the engines can be used for lift, whereas a single rotor helicopter uses power to counter the torque. |
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==List of transverse rotor |
==List of transverse rotor aircraft== |
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===Transverse-mounted helicopters=== |
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* [[Bratukhin B-11]] (1948) |
* [[Bratukhin B-11]] (1948) |
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* [[Cierva W.5]] (1938) |
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* [[Cierva W.11 Air Horse]] (1948) - a three rotor helicopter |
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* [[Firth Helicopter]] (1952) |
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* [[Kamov Ka-22]] (1959) |
* [[Kamov Ka-22]] (1959) |
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* [[Kamov V-100]] (1980s) - unbuilt project |
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* [[McDonnell XHJH Whirlaway]] (1946) |
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* [[Mil Mi-12]] (1967) |
* [[Mil Mi-12]] (1967) |
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===Transverse-mounted tiltrotors=== |
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* [[ |
* [[AgustaWestland AW609]] |
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* [[Bell Eagle Eye]] |
* [[Bell Eagle Eye]] |
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* [[ |
* [[Bell XV-3]] |
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* [[Bell Boeing V-22 Osprey]] |
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===Transverse-mounted tiltwings=== |
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* [[Canadair CL-84 Dynavert]] |
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==See also== |
==See also== |
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{{commonscat|Transverse-rotor helicopters}} |
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* [[Coaxial rotors]] |
* [[Coaxial rotors]] |
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* [[Intermeshing rotors]] |
* [[Intermeshing rotors]] |
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* [[Tiltrotor]] |
* [[Tiltrotor]] |
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==References== |
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{{reflist}} |
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===Works cited=== |
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*{{cite book |last1=El-Sayed |first1=Ahmed F. |title=History and Evolution of Aircraft: Technological Advancements in Size, Speed, Armaments, and Engines |date=31 July 2024 |publisher=CRC Press |isbn=978-1-040-04874-0 |url=https://books.google.com/books?id=-G8PEQAAQBAJ}} |
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{{component-aircraft-stub}} |
{{component-aircraft-stub}} |
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Latest revision as of 14:02, 30 October 2024
 | This article needs additional citations for verification. (October 2024) |
A transverse-rotor aircraft is an aircraft with two large horizontal rotor assemblies mounted side by side.
Single-rotor helicopters (unicopters) need an additional tail rotor or tail exhaust to neutralize the reactional angular momentum produced by the main rotor. Transverse rotor helicopters, however, use counter-rotating rotors, with each cancelling out the other's torque. Counter-rotating rotor blades also won't collide with and destroy each other if they flex into the other rotor's pathway. In addition, transverse rotor configuration has the advantage of higher payload with shorter blades, since there are two sets working to provide lift. Also, all of the power from the engines can be used for lift, whereas a single-rotor helicopter must divert part of its engine power to generate tail thrust.
Transverse rotor design with rotatable nacelles are known as tiltrotors while designs where the whole wing rotates are known as tiltwings.
List of transverse rotor aircraft
[edit]Transverse-mounted helicopters
[edit]- Bratukhin B-11 (1948)
- Bratukhin G-3 (1946)
- Cierva W.5 (1938)
- Cierva W.11 Air Horse (1948) - a three rotor helicopter
- Firth Helicopter (1952)
- Focke-Achgelis Fa 223 Drache (1941)[1]
- Focke-Wulf Fw 61 (1936)[1]
- Kamov Ka-22 (1959)
- Kamov V-100 (1980s) - unbuilt project
- Landgraf H-2 (1944)
- McDonnell XHJH Whirlaway (1946)
- Mil Mi-12 (1967)
- Platt-LePage XR-1 (1941)
Transverse-mounted tiltrotors
[edit]Transverse-mounted tiltwings
[edit]See also
[edit]
Wikimedia Commons has media related to Transverse-rotor helicopters.
References
[edit]- ^ a b El-Sayed 2024, p. 241.
Works cited
[edit]- El-Sayed, Ahmed F. (31 July 2024). History and Evolution of Aircraft: Technological Advancements in Size, Speed, Armaments, and Engines. CRC Press. ISBN 978-1-040-04874-0.
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